Shakespeare famously referred to jealousy as a "green-eyed monster," cementing the association of green with envy. Green is commonly connected to the natural world, including forests, grass, and trees, embodying notions of balance, sustainability, tranquility, and growth. Additionally, green is often associated with wealth, luck, health, and envy. During the Middle Ages, people's clothing color denoted their social status and occupation, with merchants and bankers having green attire. In ancient Egypt, green symbolized regeneration and rebirth.